Exploring the optical and dielectric properties of bifunctional and trifunctional epoxy polymers
Article dans une revue avec comité de lecture
Author
JDIDI, Haythem
210122 Faculté des Sciences de Sfax [FSS]
1051130 Systèmes et Applications des Technologies de l'Information et de l'Energie [SATIE]
210122 Faculté des Sciences de Sfax [FSS]
1051130 Systèmes et Applications des Technologies de l'Information et de l'Energie [SATIE]
FOURATI, Najla
1051130 Systèmes et Applications des Technologies de l'Information et de l'Energie [SATIE]
1051130 Systèmes et Applications des Technologies de l'Information et de l'Energie [SATIE]
ZERROUKI, Chouki
1051130 Systèmes et Applications des Technologies de l'Information et de l'Energie [SATIE]
1051130 Systèmes et Applications des Technologies de l'Information et de l'Energie [SATIE]
IBOS, Laurent
25533 Centre d'Etudes et Recherches en Thermique, Environnement et Systèmes [Créteil] [CERTES EA 3481]
25533 Centre d'Etudes et Recherches en Thermique, Environnement et Systèmes [Créteil] [CERTES EA 3481]
Abstract
Two polymers were prepared from diglycidyl ether of bisphenol A (DGEBA) and triglycidyl p-aminophenol (TGAP) epoxy resins, using the same hardener diethylenetriamine (DETA). The obtained polymers were compared in terms of structural, optical, mechanical, thermal and dielectric properties. Dielectric spectroscopy and dynamic mechanical analysis indicated the presence of dipolar dielectric relaxations in both polymers, and interfacial one only for TGAP/DETA, which is consistent with XRD findings. Different approaches were considered to fit electrical modulus and conductivity and to estimate the relaxation times and activation energies according to temperature. For optical measures, a novel result processing approach is proposed for an accurate determination of the polymers bandgap and for highlighting the existence of additional energy transition level for TGAP. Results indicate that this polymer could be a potential candidate for use as a protective film and as UV/blue-light filter for screens and windows
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